Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 12:14 PM
Duration
596.56 ms
Status
200
Response Size
88 KB
Error
No

Performance Breakdown

Database
4.0% (9 queries)
View Rendering
1.9%
Application Logic
94.0%
Other Operations
0.0%
Total Operations
21
Slowest Operation
596.56 ms

Request Trace

How to read this

Each row is a layer of your stack. Many short Database bars means N+1 queries — fix with includes(). A wide Action bar with little Database time means slow Ruby code. A wide View bar usually means a partial rendered in a loop.

Action
View
Database
Other
Action
View
Database
0.0ms 1110.2ms 2220.5ms 3330.7ms 4441.0ms

Operations

How to use this

Sort by Impact to find your biggest wins. Click any row for details and optimisation suggestions. The same SQL appearing multiple times is an N+1 — fix with includes(). A single operation above 50% impact is your highest priority.

Operation Duration Impact Timeline Actions
posts/show 12 ms 2.0%
home#slow 597 ms 100.0%
home#slow 597 ms 100.0%
home#slow 597 ms 100.0%
SELECT * FROM users WHERE id = ? 21 ms 3.5%
home#slow 597 ms 100.0%
home#slow 597 ms 100.0%
layouts/application 24 ms 4.0%
home/index 35 ms 5.9%
users/index 5 ms 0.8%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 5 ms 0.8%
SELECT name FROM users 6 ms 1.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 1.5%
SELECT * FROM users WHERE id = ? 35 ms 5.9%
SELECT * FROM posts WHERE created_at > ? 13 ms 2.2%
SELECT * FROM posts WHERE created_at > ? 35 ms 5.9%
home#slow 597 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 30 ms 5.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 4.2%
users/index 10 ms 1.7%
home#slow 597 ms 100.0%